I want to know what are the ideal specs for wheels and tires for the 4th generation max? Is 16x7 okay? what size tires to use? What bout 18x7.5? Is 235-40-18 a good size? Please help...

offsets are good from 35-40mm, I believe. You can get as big as 10 in the back, and 9 in the front.

check here for some useful info regarding wheel and tire fitment: https://maxima.org/maxfaqs/sub_tires...#TiresWheels_2

so this size 18x7.5 +45mm 27.5lbs wouldnt fit? This is the specs for the Motegi Mr-7...